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# X is a non-volatile solute and Y is a volatile solvent. The following vapour pressures are observed by dissolving X and Y :

 $X/mol\; lit^{-1}$ $Y/mm\;of\;Hg$ 0.10 0.25 0.01 $P_1$ $P_2$ $P_3$

The correct order of vapour pressure is :

$(1)\;P_1 < P_2 < P_3$

$(2)\;P_3 < P_2 < P_1$

$(3)\;P_3 < P_1 < P_2$

$(4)\;P_2 < P_1 < P_3$

$(4);P_2 < P_1 < P_3$